<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="success" class="addButton" @click="addCate">添加分类</el-button>
        </el-col>
      </el-row>
      <!-- 表格 -->
      <zk-table :data="catelist" :columns="columns" :selection-type="false" :expand-type="false" show-index
        index-text="-" border>
        <!-- 是否有效模板 -->
        <template slot="isok" slot-scope="scope">
          <i class="el-icon-success" style="color: lightgreen" v-if="scope.row.cat_deleted === false"></i>
          <i class="el-icon-error" v-else style="color: lightgreen"></i>
        </template>
        <!-- 排序模板 -->
        <template slot="order" slot-scope="scope">
          <el-tag v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag type="success" v-else-if="scope.row.cat_level === 1">二级</el-tag>
          <el-tag type="warning" v-else>三级</el-tag>
        </template>
        <!-- 操作模板 -->
        <template slot="opt" slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.cat_id)">编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeCateById(scope.row.cat_id)">删除</el-button>
        </template>
      </zk-table>
      <!-- 分页 -->
      <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange"
        :current-page="querInfo.pagenum" :page-sizes="[3, 5, 10, 15]" :page-size="querInfo.pageSize"
        layout="total, sizes, prev, pager, next, jumper" :total="total">
      </el-pagination>
    </el-card>
    <!-- 添加分类 -->
    <el-dialog title="添加分类" :visible.sync="addCateDialogVisible" width="50%" :addDialogVisible="false"
      @close="addCateDialogClosed" :close-on-click-modal="false">
      <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef">
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <!-- options用来指定数据源 -->
        <el-form-item label="父级分类">
          <el-cascader v-model="selectedKeys" :options="parentCateList"
            :props="{ expandTrigger: 'hover', ...cascaderProps, checkStrictly: true }" @change="parentCateChanged" clearable>
          </el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addNewCate">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑分类 -->
    <el-dialog title="修改分类" :visible.sync="editDialogVisible" 
    width="50%" :close-on-click-modal="false" @close="editDialogClosed"
    >
      <el-form ref="editFoemRef" :model="editForm" :rules="editFormRules">
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="editForm.cat_name">
          </el-input>
        </el-form-item>

      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: '',
  data() {
    return {
      catelist: [],
      // 查询条件
      querInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 10,
      },
      total: 0,
      // 为table指定列
      columns: [{
        label: '分类名称',
        prop: 'cat_name',
      }, {
        label: '是否有效',
        // 将当前列定义为模板列
        type: 'template',
        // 当前列使用的模板名称
        template: 'isok'
      }, {
        label: '排序',
        type: 'template',
        template: 'order'
      }, {
        label: '操作',
        type: 'template',
        template: 'opt'
      }],
      addCateDialogVisible: false,
      addCateForm: {
        cat_pid: 0,
        cat_name: '',
        cat_level: 0,
      },
      addCateFormRules: {
        cat_name: [{ required: true, message: '请输入分类名称', trigger: 'blur' }]
      },
      parentCateList: [],
      // 指定级联选择器的配置对象
      cascaderProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      selectedKeys: [],
      editDialogVisible:false,
      editForm:{
        cat_id:'',
        cat_name:'',
        cat_pid:'',
        cat_level:''
      },
      editFormRules:{
        cat_name:[{required: true, message: '请输入用户名', trigger: 'blur'}]
      },

    };
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories', { params: this.querInfo })
      if (res.meta.status !== 200) return this.$message.error('获取商品分类失败')

      this.catelist = res.data.result
      this.total = res.data.total
    },
    handleSizeChange(newSize) {
      this.querInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange(newPage) {
      this.querInfo.pagenum = newPage
      this.getCateList()
    },
    addCate() {
      this.getParentCate()
      this.addCateDialogVisible = true
    },
    async getParentCate() {
      const { data: res } = await this.$http.get('categories', {
        params: {
          type: 2
        }
      })
      if (res.meta.status !== 200) return this.$message.error('获取父级分类失败')
      this.parentCateList = res.data
    },
    parentCateChanged() {
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length - 1]
        this.addCateForm.cat_level = this.selectedKeys.length
        return
      }
      else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }

    },
    addNewCate() {
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('categories', this.addCateForm)
        if (res.meta.status !== 201) {
          console.log(this.addCateForm)
          return this.$message.error('添加分类失败')
        }
        this.$message.success('添加分类成功')
        this.getCateList()
        this.addCateDialogVisible = false
      })
    },
    // 对话框关闭重置表单数据
    addCateDialogClosed() {
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys = []
      this.addCateForm.cat_level = 0
      this.addCateForm.cat_pid = 0
    },
    async showEditDialog(id){
      const {data:res} = await this.$http.get('categories/'+id)
      if(res.meta.status !== 200) return this.$message.error('获取分类信息失败')
      this.editForm = res.data
      this.editDialogVisible = true
    },
    async editCate(){
      const {data:res} = await this.$http.put('categories/'+this.editForm.cat_id,{ cat_name:this.editForm.cat_name })
      if(res.meta.status !== 200) return this.$message.error('修改分类信息失败')
      this.getCateList()
      this.editDialogVisible = false
      this.$message.success('修改分类信息成功')
    },
    editDialogClosed(){
      this.$refs.editFoemRef.resetFields()
    },
    async removeCateById(id){
      const confirmResult = await this.$confirm('确认删除此分类吗?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            if(confirmResult !== 'confirm'){
              return this.$message.info('已取消删除')
            }
            const {data:res} = await this.$http.delete('categories/'+id)
            if(res.meta.status !== 200) return this.$message.error('删除分类失败')
            this.getCateList().
            this.$message.success('删除分类成功')
    }
  },

}

</script>
<style lang='less' scoped>
.addButton {
  margin-bottom: 15px;
}

.el-cascader {
  width: 100%;
}
</style>